title: Blood group A and B activity associated with factor VIII - von Willebrand factor.
abstract: This report presents further progress on the characterization of blood group activities associated with F VIII/vWf. Evidence is provided that a relationship exists between the nature of the soluble blood group substance of plasma and of F VIII/vWf isolated from this plasma. A mixture of F VIII/vWf from O blood group plasma with A and B substances leads to a purified F VIII/vWf with AB blood group activity. Furthermore, chemical analysis of glycans released from F VIII/vWf by alkaline-borohydride treatment or hydrazinolysis shows the absence of N-acetylgalactosamine residues in non-reducing terminal positions. These results suggest that the blood group activity of F VIII/vWf preparations may be related to minor contamination of this molecule by glycolipidic or glycoproteinic plasma components with A or B oligosaccharide structures.
mesh_terms: D000017:ABO Blood-Group System; D001779:Blood Coagulation Factors; D005169:Factor VIII; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007106:Immune Sera / Q000494:pharmacology; D011134:Polysaccharides / Q000276:immunology; D014841:von Willebrand Factor
chemical_list: D000017:ABO Blood-Group System; D001779:Blood Coagulation Factors; D007106:Immune Sera; D011134:Polysaccharides; D014841:von Willebrand Factor; D005169:Factor VIII